Antenna mast



FIG. 1 is a front elevational view of an antenna mast showing my new design, the rear and sides being identical;

FIG. 2 is a top plan view thereof; and,

FIG. 3 is a bottom plan view thereof.

The broken line showing of the antenna whip in FIG. 1 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an antenna mast, as shown and described. 